<template>
        <!-- Loading加载区域 -->
      <el-container class="home_container">
          <!-- 头部区域 -->
      <el-header>
          <div>
              <img src="/../assets/tubiao2.png" alt="">
              <span>易通综合商店后台管理系统</span>
          </div>
          <el-button type="info" @click="logout" class="btn">退出</el-button>
      </el-header>
      <!-- 页面主体部分 -->
      <el-container>
        <!-- 侧边栏部分 -->
        <el-aside :width="isCollapse ? '64px' : '200px'">
            <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu
        background-color="#333744"
        text-color="#fff"
        active-text-color="#23A9F2" :unique-opened="true" :collapse-transition="false" :collapse="isCollapse" :router="true" :default-active="activePath">
        <!-- 一级菜单 -->
        <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">            
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
            <!-- 图标 -->
            <i :class="iconObj[item.id]"></i>
            <!-- 文本 -->
            <span>{{item.authName}}</span>
            </template>
            
            <!-- 二级菜单 -->
            <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
                <template slot="title">
                    <!-- 图标 -->
                    <i class="el-icon-menu"></i>
                    <!-- 文本 -->
                    <span>{{subItem.authName}}</span>
                </template>
            </el-menu-item>
        </el-submenu>
        </el-menu>
        </el-aside>
        <!-- 右侧内容主体部分 -->
        <el-main>
            <!-- 路由占位符 -->
            <router-view></router-view>
        </el-main>
      </el-container>
      </el-container>
</template>

<script>
  export default {
      data() {
          return {
              // 左侧菜单数据
              menulist: [],
              iconObj: {
                  '125': 'iconfont icon-user',
                  '103': 'iconfont icon-tijikongjian',
                  '101': 'iconfont icon-shangpin',
                  '102': 'iconfont icon-danju',
                  '145': 'iconfont icon-baobiao'
              },
              // 是否折叠 false为不折叠 true为折叠
              isCollapse: false,
              // 被激活的链接地址
              activePath: ''
          }
      },
      created() {
          this.getMenuList()
          this.activePath = window.sessionStorage.getItem('activePath')
      },
      methods: {
          logout() {
              window.sessionStorage.clear();
              this.$router.push("/login")
          },
          // 获取所有的菜单
         async getMenuList() {
            const {data: res} = await this.$http.get('menus')
            if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
            this.menulist = res.data
            // console.log(res);
            
          },
          // 点击案例 切换菜单的折叠与展开
          toggleCollapse() {
              this.isCollapse = !this.isCollapse
          },
          // 保存激活链接的状态
          saveNavState(activePath) {
              window.sessionStorage.setItem('activePath', activePath)
              this.activePath = activePath
          }
      }
}
</script>

<style lang="less" scoped>
.el-header {
    background-color: #373D41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    > div {
        display: flex;
        align-items: center;
        > span {
            padding-left: 15px;
        }
    }
}
.el-aside {
    background-color: #333744;
}
.el-main {
    background-color: #eaedf1;
}
.home_container {
    height: 100%;
}
.iconfont {
    margin: 10px;
}
.el-menu {
    border-right: 0;
}
.toggle-button {
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center; 
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>
